Question

Find the radius of a circle in which the length of the tangent is 4 cm and the distance of the point from which the tangent is drawn to the circle from the centre is 5 cm

Answer 1

Answer:

Given: OA=5 cm and AB=4 cm

ΔAOB is right angle triangle, right angle at B

By using Pythagoras Theorem, we have

OB

2

+AB

2

=OA

2

OB is the radius of triangle

OB

2

+16=25

⟹OB

2

=25−16

⟹OB

2

=9

⟹OB=

9

=3cm

Radius of circle is 3 cm

Answer 2

Answer:

3cm

Step-by-step explanation:

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